静止轨道卫星半长轴标定新方法

A New Method for Calibration of Semi-major Axis of a Geostationary Orbit Satellite

提出了利用控前2次定轨结果计算的日平均星下点来确定每天的平均半长轴，从而得到只包含地球非球形引力摄动长期项的日平均半长轴，并用此计算目标轨道的方法。为东西控制目标半长轴的选取提供了一种新方法。该方法已多次应用于数颗同步卫星的东西控制中，取得了很好的效果。

In this paper, by using twice orbit determination, the daily nadir points are calculated to determine the daily semi-major axis, which only includes the long terms in the perturbation of the nonspherical gravitational potential, as to provide a new method to select the object of the east-west control. That method has been applied repeatedly to the east-west control of geostationary orbit satellites, and gained good effect according to the result of the control.